Form for use in shuttering



Aug. 22, 1950 H. c. HUlSH FORM FOR USE IN SHUTTERING Filed July 19,v1947 2 Sheets-sheaf 1 1a [12 I f A is If 0 I Q /0 O 0 9i I I 5 g g a Ls- 5 z *6 o of 0 D o O m .0 of

' 1a I? I 1/ 0 0 5 1 GD 0 GD I I I I [I I I I I I II I I I I I I I I I II?- I I l4? Au8- 1950 I H. c. HUISH 2,519,575

FORMFOR USE IN SHUTTERING Filed July 19, 1947 2 Sheets-Sheet 2 I MMWJMgamers 5), such additional members being formed conveniently of angleiron as shown in Figures 4 and 5, welded to the face-plate I.

To the external surface of the bottom of the channel or channel iron 2is welded an angle iron B'With the free flange thereof away from theface-plate l, and to the inner surface of the wall of angle iron 3 awayfrom the face-plate l is welded a flat strip or bar I0, one edge ofwhich extends from within the channel of said channel iron 3.

Two or more metal bars II, three in the example shown, are disposedtransversely of and connected to the angle iron 9 of channel iron 2 andthe bar IU of the channel iron 3, by means of bolts or screws I2. Thebars Il may be of metal strip capable of being flexed to the desiredcurvature,'the strip being provided with slots I3 for the passage of thebolts or screws 12 to permit adjustment of the bars I I transversely ofthe angle irons 2 and 3 and of the additional stiffening members 8 asthe face-plate l is bent to th desired curvature prior to clamping ofthe bars ll. Alternatively the bars II may be stifl bars of preformedcurvature. When in the connected position the bars II are spaced fromthe rear surface of the face-plate I and in the space are accommodatedcorrugated steel sheets I4 disposed with the lines of the corrugationgenerally parallel to the channel irons 2 and 3.

In the case illustrated the bars II are connected with a stiifener 8located in the region of the centre line of the form in such a manner asto be incapable of transverse movement relative thereto; the bolt andslot connection l2 and I3 described above being provided at the edgestifieners 2 and 3 and the remaining stiffeners 8 between the centreline and the edges.

The corrugated steel sheets I4 may be retained in position by disposingthem with a groove or corrugation enveloping one of the angle ironstifleners 8 (see Figure 5) the bolts 42 securing the slotted bars I Ito that angle iron passing through holes in the corrugated sheet. Insuch case the small lugs I5 of relatively small width are provided onthe angle iron 8 for engagement by the bolts [2.

Other stiffening angle irons 8 such as that of Figure 4 may be left freeof the corrugated sheets HI or in other words the edges of separatecorrugated sheets may lie at each side of the angle lIOIl.

The ends of the bars I I instead of being slotted may be forked as shownin Figure 8 and the surface of the bar ends, whether forked or slotted,may be provided with serrations NS for engagement by a correspondinglyserrated washer I! provided beneath the head of the bolt.

In the case of narrow forms the intermediate stifiening angle irons 8may be omitted.

The sheets of corrugated steel I4 between the metal face-plate I and thebars II readily accommodate themselves to the required curvature of theface-plate and thereafter constitute very efficient bracing elements.The corrugated steel sheets are preferably somewhat shorter than theheight of the metal face-plate I.

The improved form may of course also be used fiat, i. e. with straightor unflexed bars I I.

A number of the forms as described above may be readily assembled edgeto edge by nesting the projections 7 of one in the channel of channeliron 2 of the nextand soon, nd they maybe 4 used to produce eitherconcave or convex surfaces and'surfaces of simple or compound curvature.They are also well adapted for use in conjunction with the fiat formsdescribed in my copending application for patent Ser. No. 762,063 whenit is desired to produce curved surfaces merging into flat surfaces.

I claim:

l. A form for shuttering as used for constructional work in concrete,comprising a four-sided flexible metal face-plate, a number ofstiffening members extending between two opposite edges of the sheet atthe back thereof and fixed to the face-plate in spaced and generalparallel relationship with one another, and including one stiffeningmember of channel section mounted. in the region of one edge oftheface-plate with the channel outwardly directed, a second stiffeningmember mounted in the region of the opposite edge of the face-plate andprojections on said second member extending in the outward directionfrom said second member and of a size to nest within channel sectionmembers similar to the said first stiffening member of channel sectionof a similar form, at leastone flexible bar disposed transversely of andconnected with said' stiffening members in such manner as to permitrelative adjusting movement in the transverse direction between said barand at least one of said first and second members and at least one sheetof corrugated material flexible.

in one direction disposed between the back of the face-plate and thesaid flexible bar with the lines of the corrugations extending in thegeneral direction parallel to the said stiffening members.

2. A form as claimed in claim 1 wherein one of the first and secondstiffening members is mounted so as to project outwards by a shortdistance from the edge of the face-plate at which it is mounted and theother is set back by a similar short distance from the edge of thefaceplate at which it is mounted.

3. A form as claimed in claim 1 and including at leastdone stiffeningmember fixed to the back of the face-plate intermediate the said firstand second stiffening members, the said flexible bar being afilxed toone of said intermediate stiffening members in such a manner as to beincapable of transverse movement relative thereto."

'4. A-form as claimed in claim 1 wherein the said second stiffeningmember is also of channel section with the walls of the channel deformedto provide the outwardly extending projection in the form of a channelbottom of smaller width than that of the main portion of theichannel,

the external width of said channel bottom being,

equal to the internal width of the said first channel section stifieningmember.

, HERBERT CHARLES HUISH.

REFERENCES CITED The following references are-ofrecord in;.the

file of this patent; I, V UNITED STATES PATENTS France May 8, 1931

